Co-doping of CeBr3 scintillator detectors for energy resolution enhancement

Quarati, F.; Alekhin, Mikhail S.; Krämer, Karl; Dorenbos, P.

doi:10.1016/j.nima.2013.10.004

Cited by 55 publications

(33 citation statements)

References 11 publications

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“…[70][71][72] Given the reduction of free-electron density mentioned above, nonradiative quenching will be dramatically reduced and, consequently, the nonproportionality reduced in the low-energy region, as observed in the experiments.…”

Section: Reviewmentioning

confidence: 52%

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Recent R&D Trends in Inorganic Single‐Crystal Scintillator Materials for Radiation Detection

Nikl

Yoshikawa

2015

Advanced Optical Materials

657

374

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In this review, the major achievements and research and development (R&D) trends from the last decade in the field of single crystal scintillator materials are described. Two material families are included, namely, those of halide and oxide compounds. In most cases, the host crystals are doped with Ce3+, Pr3+ or Eu2+ rare earth ions. Their spin‐ and parity‐allowed 5d–4f transitions enable a rapid scintillation response, on the order of tens to hundreds of nanoseconds. Technological recipes, extended characterization by means of optical and magnetic spectroscopies, and theoretical studies are described. The latter provide further support to experimental results and provide a better understanding of the host electronic band structure, energy levels of specific defects, and the emission centers themselves. Applications in medical imaging and dosimetry, security measures, high‐energy physics and the high‐tech industry, in which X(γ)‐rays or particle beams are used and monitored, are recognized as the main driving factor for R&D activities in this field.

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Section: Reviewmentioning

confidence: 52%

“…Reproduced with permission. [ 69 ] Another study, focussing on the energy-resolution enhancement in monovalent and divalent ion-doped CeBr 3 , found that Sr dopant clearly improves the energy resolution down to at least 3%@662 keV [ 70 ] due to the diminished nonproportionality (see Table 1 ). Table 1 ).…”

Section: Rare Earth Halidesmentioning

confidence: 99%

Recent R&D Trends in Inorganic Single‐Crystal Scintillator Materials for Radiation Detection

Nikl

Yoshikawa

2015

Advanced Optical Materials

657

374

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“…[9] It has also been demonstrated that codoping of Y 2 SiO 5 :Ce, LYSO:Ce, LaBr 3 :Ce, and CeBr 3 with divalent alkali-earth ions results in enhancement of scintillation light yield and improvement of the energy resolution of the detectors based on these materials. [12,[22][23][24][25] Moreover, it was recently demonstrated that aliovalent co-doping by Sr 2þ of the most widely used NaI(Tl) scintillation crystals also improves their energy resolution. [26] This is an indication that the defect associated with the alivovalent codoping (Mg 2þ , Ca 2þ , Sr 2þ ) is most likely a matrix host defect.…”

Section: Introductionmentioning

confidence: 99%

Excitation Transfer Engineering in Ce‐Doped Oxide Crystalline Scintillators by Codoping with Alkali‐Earth Ions

Auffray

Augulis

Fedorov

et al. 2018

Physica Status Solidi (a)

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Time‐resolved spectroscopic study of the photoluminescence response to femtosecond pulse excitation and free carrier absorption at different wavelengths, thermally stimulated luminescence measurements and investigation of differential absorption are applied to amend the available data on excitation transfer in GAGG:Ce scintillators, and an electronic energy‐level diagram in this single crystal is suggested to explain the influence of codoping with divalent Mg on luminescence kinetics and light yield. The conclusions are generalized by comparison of the influence of aliovalent doping in garnets (GAGG:Ce) and oxyorthosilicates (LSO:Ce and YSO:Ce). In both cases, the codoping facilitates the energy transfer to radiative Ce3+ centers, while the light yield is increased in the LYSO:Ce system but reduced in GAGG:Ce.

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“…and Ba 2+ ) doping on the non-proportionality of the CeBr 3 scintillator crystal and the non-proportionality in the low energy region was improved by the doping (Quarati et al, 2014). According to the previous report, the improvement of the non-proportionality by the alkali metal or alkali earth metal doping is originated from a more efficient e-h pair creation and/or energy transfer from the e-h pairs to the luminescent centers at energy below 100 keV.…”

Section: Introductionmentioning

confidence: 81%

Effects of Na and K co-doping on growth and scintillation properties of Eu:SrI2 crystals

Ito

Yokota

Kurosawa

et al. 2016

Radiation Measurements

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We grew Na and K co-doped Eu:SrI 2 [Na,Eu:SrI 2 and K,Eu:SrI 2 ] crystals by a modified micro-pulling-down method to reveal the co-doping effects on the crystal growth and scintillation properties. The non-codoped, Na0.5%, Na1.0%, K0.5% and K1.0%,Eu:SrI 2 crystals indicated high transparency while the milky parts were generated in the Na5.0% and K5.0%,Eu:SrI 2 crystals. The light yields of Na,Eu:SrI 2 and K,Eu:SrI 2 crystals under -ray irradiation were decreased by the Na and K co-doping. On the other hand, there was a small change within 940~1020 ns in the decay times by the Na and K co-doping. In the light yield proportionality under -ray irradiation, the non-proportionality in the low energy region was improved by Na and K co-doping.

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Co-doping of CeBr3 scintillator detectors for energy resolution enhancement

Cited by 55 publications

References 11 publications

Recent R&D Trends in Inorganic Single‐Crystal Scintillator Materials for Radiation Detection

Recent R&D Trends in Inorganic Single‐Crystal Scintillator Materials for Radiation Detection

Excitation Transfer Engineering in Ce‐Doped Oxide Crystalline Scintillators by Codoping with Alkali‐Earth Ions

Effects of Na and K co-doping on growth and scintillation properties of Eu:SrI2 crystals

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